Fastening device



FIG. 1 is a perspective view of a fastening device showing my new design;

FIG. 2 is a front view thereof, rear view being identical to front view;

FIG. 3 is a right side view thereof, left side view being identical to right side view;

FIG. 4 is a plan view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a perspective view of a male body;

FIG. 7 is a perspective view of a female body;

FIG. 8 is bottom view of the male body;

FIG. 9 is plan view of the female body;

FIG. 10 is a cross-sectional view of the fastening device taken along line 10-10 in FIG. 4;

FIG. 11 is a cross-sectional view thereof taken along line 11-11 in FIG. 4;

FIG. 12 is a cross-sectional view thereof taken along line 12-12 in FIG. 4; and,

FIG. 13 is a cross-sectional view thereof taken along line 13-13 in FIG. 4.

The broken lines depict portions of the fastening device and form no part of the claimed design. 

The ornamental design for a fastening device, as shown and described. 